Leek and potato soup has been around since the French mastered the pairing centuries ago, and it has stayed popular because of simple math — leeks and potatoes cost almost nothing, and the result tastes like a hundred dollars. The trick is patience at the start (soft, not browned leeks) and restraint at the end (under-blended, not over). An hour of mostly hands-off cooking and the kitchen smells like a bistro.
Soup
Easy
French
Creamy leek and potato soup
A silky leek and potato soup with a splash of cream and fresh thyme — the comforting one-pot dinner that turns five ingredients into a meal.
- Prep
- 10 min
- Cook
- 35 min
- Total
- 45 min
- Serves
- 6
Creamy leek and potato soup
Serves
6
Scaled 1×. Ingredients adjusted — but cook time, pan size, and oven temperature don't scale linearly. A bigger batch usually needs a bigger pan and a few extra minutes; a smaller batch often finishes sooner. Trust your eyes, not the timer.
Ingredients (13)
To finish
You'll need
- Large pot or Dutch oven (4+ quart)
- Immersion blender or stand blender
- Sharp knife and cutting board
- Large bowl (for cleaning leeks)
Instructions
0 of 8
Nutrition
Estimated per serving · 1 serving (about 1 1/2 cups)
290
Calories
6 g
Protein
35 g
Carbs
14 g
Fat
4 g
Fiber
6 g
Sugar
720 mg
Sodium
What to look for when you shop
Best varieties
- Yukon Gold potatoes — creamy, buttery, holds shape while pureeing smoothly; the ideal choice
- Russet — more starchy; gives a fluffier, lighter soup
- Kennebec — similar to Russet; classic choice in restaurants
- Leeks: American Flag — large and mild, the standard
- Leeks: Bleu de Solaise — French heirloom with blue-green leaves; sweeter
Ripeness
Potatoes should feel firm with taut, dry skins — no soft spots, sprouts, or green tinges (green patches are mildly toxic; trim away). Leeks should be crisp with tight white stems and fresh green tops — floppy leeks have been sitting too long.
Imperfections are fine
Small eyes on potatoes are fine — cut them out. Slight blemishes on the skins don't affect the inside. Leeks with a bit of damaged outer leaves peel away fine. Mud on the root end is normal — that's how fresh leeks arrive.
Good substitutions
- Swap leeks for 2 large onions plus 1 bunch of scallions — different but still delicious
- Cauliflower potato soup: swap half the potatoes for cauliflower florets for a lighter version
- Sweet potatoes — 1-for-1 swap for a sweeter, autumnal twist
- Add 1 cup chopped kale or spinach in the last 3 minutes for a greener bowl
In season
US leek season peaks September through March. Potatoes are available year-round, but local fall harvest potatoes have the best flavor through spring.
How much to buy
About 1 1/2 lb leeks (3 large, or 1 bunch) and 1 1/2 lb potatoes (4 medium).
From a grower near you
Find your leek and potato grower on CollectiveCrop
Leeks and potatoes are the kind of storage vegetables local farms handle well — proper cold storage keeps them vital for months without losing flavor. A farm-stored potato in April still tastes like something; a supermarket one often doesn't. CollectiveCrop is how you find the farms running a real root cellar. For a five-ingredient soup, ingredient quality is the whole thing.
- In season Potatoes: July – April (storage crop). Leeks: September – March
- For this recipe 1 1/2 lb potatoes + 1 1/2 lb leeks
- Freshness Picked within this month
- Imperfects welcome Second-grade produce works great here
- Diet-friendly vegetarian · gluten-free
- While you're there Onions and garlic · Fresh thyme · Butter and cream from a local dairy · Crusty bread from a local baker · Root vegetables (carrots, parsnips)
At the market
About 1 1/2 lb leeks (3 large, or 1 bunch) and 1 1/2 lb potatoes (4 medium).
Best varieties
- Yukon Gold potatoes creamy, buttery, holds shape while pureeing smoothly; the ideal choice
- Russet more starchy; gives a fluffier, lighter soup
- Kennebec similar to Russet; classic choice in restaurants
Good to know
Tips
- Don't skip the leek wash. Sandy leeks ruin a good soup fast.
- A pinch of nutmeg at the end is a classic French finish — 1/8 teaspoon goes a long way.
- For extra depth, replace 1 cup of the broth with dry white wine (simmer 2 minutes to cook off the alcohol before adding broth).
- Don't over-blend. Potatoes turn glue-like when beaten. A slightly rustic texture with visible flecks of leek tastes better than a completely smooth puree.
- Save 1 cup of the leek + potato mixture unblended and stir it back in at the end for body and texture.
Storage
- Refrigerator: 4 days in an airtight container — flavor improves on day two.
- Freezer (without cream): 3 months. Thaw overnight, reheat, and stir in cream fresh.
- Freezer (with cream): not recommended — cream can separate when thawed.
Reheating
- Stovetop: medium-low heat, stirring occasionally, with a splash of broth or cream to loosen (5 to 7 minutes).
- Microwave: 2 minutes on medium, stir, 1 to 2 more minutes until hot.
- Avoid high heat — it can break the cream and turn the texture grainy.
Make ahead
- Clean and slice the leeks up to 2 days ahead; store wrapped in a damp paper towel in a zip-top bag.
- The full soup (without cream) can be made up to 3 days ahead; reheat and add cream before serving.
- Prep all vegetables the night before to make this a 30-minute weeknight meal.
Variations
- Vichyssoise: chill the soup thoroughly after blending, thin with a splash of cold milk, serve cold with chives.
- Loaded leek-potato: top with crumbled bacon, shredded cheddar, sour cream, and scallions.
- Bacon-leek: cook 4 slices of bacon in the pot before adding leeks; use the fat to sauté them.
- Curry leek-potato: add 1 tablespoon curry powder with the garlic; finish with coconut milk instead of cream.
- Roasted garlic version: roast a whole head of garlic and squeeze it into the pot with the potatoes.
- Crispy leek garnish: fry 1/4 cup julienned leek whites in hot oil until golden; scatter over the top.
Swaps
- Vegan: replace butter with olive oil or vegan butter; swap cream for full-fat coconut milk or cashew cream; use vegetable broth.
- Dairy-free: use olive oil instead of butter and canned coconut milk instead of cream.
- Lower-calorie: use whole milk instead of cream; skip the cream drizzle garnish.
- Gluten-free: already gluten-free; serve with GF bread or skip.
Frequently Asked Questions
What's the difference between leek and potato soup and vichyssoise?
Vichyssoise is the French cold version — puréed very smooth, enriched with cream, and served chilled. This recipe is the warm rustic version. Both start the same way; you just choose temperature and texture at the end.
How do I clean leeks properly?
Trim the dark green tops and root end. Split the white and light-green section lengthwise, then slice into half-moons. Submerge the slices in a bowl of cold water, swish, and let the grit sink. Lift the leeks out with your hands (don't pour — the grit follows).
Can I use the dark green leek tops?
They're too fibrous for this soup but excellent in stock. Save them in the freezer for the next batch of vegetable or chicken stock.
What's the best potato for this soup?
Yukon Gold is the sweet spot — creamy, buttery, and holds its shape while still pureeing smoothly. Russets work and give a fluffier texture; waxy potatoes (red, fingerling) stay too firm for a classic creamy soup.
Can I make this without cream?
Yes. The soup is delicious with just butter, milk, or vegetable broth — potatoes give it plenty of body on their own. For a richer no-cream version, add 2 tablespoons of miso or a tablespoon of crème fraîche at the end.
Why is my soup gluey?
You over-blended it. Potatoes release starch aggressively — a full blast in a high-powered blender turns it glue-like. Blend in short pulses, or use an immersion blender and stop the moment it's smooth.
Can I freeze leek and potato soup?
Yes, but before adding the cream. Cream-based soups can separate when thawed. Freeze the puréed base up to 3 months, thaw, reheat, and stir in the cream fresh.
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